According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), MailGuard is the email service provider (ESP) for 100 domains — 0.02% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
MailGuard is an email service provider identified through SPF include mechanisms embedded in email authentication records. It appears across the Tranco top-1M website ranking, indicating active use in production email infrastructure.
MailGuard's presence concentrates in the smaller-to-mid-sized operator segment rather than the largest global brands, with particular density in Australian (.com.au) domains. For email practitioners evaluating sender reputation and authentication, this regional footprint—often appearing alongside other alternative or lesser-known providers—suggests MailGuard serves a specific geographic or market niche rather than mainstream consumer-facing platforms.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 5 | 5.0% |
| Top 1,000,000 | 70 | 70.0% |
| Unranked | 25 | 25.0% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com.au | 53 | 53.0% | |
| .com | 19 | 19.0% | |
| .au | 17 | 17.0% | |
| .org | 3 | 3.0% | |
| .net.au | 2 | 2.0% | |
| .co.il | 2 | 2.0% | |
| .horse | 1 | 1.0% | |
| .eu | 1 | 1.0% | |
| .net | 1 | 1.0% | |
| .global | 1 | 1.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 100 domains.
| Type | Service | Domains | Share of MailGuard users |
|---|---|---|---|
| Mailbox | Unknown / Other | 68 | 68.0% |
| Mailbox | Microsoft 365 | 23 | 23.0% |
| Mailbox | Google Workspace | 3 | 3.0% |
| Mailbox | Proofpoint | 2 | 2.0% |
| Mailbox | Trend Micro | 1 | 1.0% |
| Mailbox | Sophos Email | 1 | 1.0% |
| ESP | Amazon SES | 18 | 18.0% |
| ESP | Mailchimp | 18 | 18.0% |
| ESP | Zendesk | 10 | 10.0% |
| ESP | Campaign Monitor | 9 | 9.0% |
MailGuard is detected in live email infrastructure primarily through its SPF include mechanisms, the standard protocol for delegating outbound mail authorisation. The concentration of its presence in .com.au domains positions it as a notable factor in Australian email routing and reputation assessment. Organisations sending to or through Australian recipients should ensure their SPF records correctly reference any MailGuard mechanisms their ESP has configured, as misalignment can degrade authentication pass rates in that region.
See the full MailGuard data page (KPI cards, trend, sample domains) →
MailGuard is an email service provider used primarily by mid-sized and regional operators, especially in Australia. If your recipient base includes Australian users or .com.au domains, including MailGuard in your SPF and authentication testing is prudent; for broader international audiences, it ranks lower in priority.
100 domains in the Tranco top-1M use MailGuard as their email service provider (ESP) as of July 13, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
MailGuard accounts for 0.02% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
MailGuard's largest TLD is .com.au (53.0% of its domains); it appears across 10 TLDs in total.